How To Use Global Stream Using Flutter Android App

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      home: MyHomePage(),
    );
  }
}

Stream<int> timedCounter(Duration interval, [int maxCount]) async* {
  int i = 0;
  while (true) {
    await Future.delayed(interval);
    yield i++;
    if (i == maxCount) break;
  }
}

Stream<int> myGlobalStream = timedCounter(Duration(seconds: 2), 50);

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int counter = 0;

  @override
  void initState() {
    super.initState();
    myGlobalStream.listen((count) => setState(() => counter = count));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.black,
      appBar: AppBar(
        backgroundColor: Colors.blue[900],
          title: Text("Using Global Stream"
          )),
      body: Center(child: Text("$counter", style: TextStyle(fontSize: 35,color: Colors.lightGreen))),
    );
  }
}